Improvement in envelopes



P. LOCKWO'OD.

Improvement in Envelopes.

No. `H4,161. Patented Apm 25, 1811'.

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iwf/fidi? WMM? 49% sind didnt PHIL() LOCKWOOD, OF AUBURN, INDANA.

Letters Patent No. 114,161, dated April 25, 1871.

IMPRCVEMENT iN ENVELOPES.

The, Schedule referred to in these Lettera Patent and making part of the same.

To all/whom lit may conce/rn:

Be it lknown that I, PnILo LooKWooD, of Auburn, in the county of De Kalb, and State of Indiana, have invented a, certain Improvement in Envelopes and I do hereby dechire that the following is n full, clear, and exact description thereof, reference being had to the annexed dranving making part oi' this specification, in which- Figure 1 represents it sheet of paper as out and creased to forni my improved envelope.

Figures 2 and 3 represent envelopes of my improved eonstrnotion, the pockets on either side of which are open nt the sides.

Figures' 4 and 5 show such envelopes with the pockets open at theeud.

Figure 6 is n transverse section of' an envelope of this kind es it appears when sealed.

The saine letters zu'e used in all the figures in the designation ofidentirnl parts.

This invention relntes to that class of envelopes which are so constructed that they may be used twice with perfect security to the contents, `:ind without eX- posing my mutilated part when used the second time.

My improvement consists in an envelope rundev double the size of the ordinary ones, folded in the of peper out to the form shown in lig. l, :tud slitted et each end midway between its sidesto points in line With the ends of the sealingaps a and b.

The sheet of paper thus shaped is also creased in the middle to form tivoV leaves, A and B, und the iinps A A being folded upon the beck of the leaf A are united at the ends to form a Wrapper with the latter, the flaps B B' being folded and united in like manner upon the face of the leaf' B to form a. wrapper there, that is, upon the opposite side to that on the leef A.

The leaves being folded together the fune of one Will be opposite the wrapper or pocket on the other and close one side of such pocket, the other side oi' which is closed by folding its sealing-flap to clasp both leaves, and sealing it to the one containing no papers, the pocket of which will bc exposedl upon the rear.

The envelope should he opened hy simply severing the Hep which is used to seni it from its leef after the first use. It een then be employed e second time b v folding the lea-ves so us to bring their opposite sides together', in order that the remaining settling-dup indy be used to seni it.

What I claim as my invention, and desire to secure by Letters Patent, is

The herein-described double envelope, constructed substantially in the manner sind for the purpose set forth.

In testimony whereof I have signed my usi-me to this specification. in the presence of two subscribing witnesses.

PHIL@ LOCKWOOD. Witnesses:

D. P. HoLLoWAY, B. Enw. J. Eins. 

